Results 41 to 50 of about 833,501 (156)

Nature of Widely Separated Ultraluminous Infrared Galaxies

The Astrophysical Journal, 2001
In the complete sample of ultraluminous infrared galaxies (ULIRGs) compiled by Kim (1995) about 5% consists of widely separated galaxies which are presumably in the early phase of interaction. This fact is contrary to the conventional view that ULIRGs are in the final stages of the merger of two gas-rich disk galaxies.
Dinh-V-Trung, Lo, K. Y., Kim, D. -C., Gao, Yu, Gruendl, R. A.   +4 more
openaire   +2 more sources

Hidden Quasars in Ultraluminous Infrared Galaxies [PDF]

Symposium - International Astronomical Union, 1999
Many ultraluminous infrared galaxies (ULIRGs) are powered by quasars hidden in the center, but many are also powered by starbursts. A simply diagnostic diagram is proposed that can identify obscured quasars in ULIRGs by their high-ionization emission lines ([O III]λ5007/Hβ ≳ 5), and “warm” IR color (f25/f60≳ 0.25).
Brotherton, M. S., Stanford, S. A., Tran, H., van Breugel, W.   +3 more
openaire   +2 more sources

Low Accretion Rates in Black Holes in Late-stage Merger Ultraluminous Infrared Galaxies

The Astrophysical Journal
We explore the accretion rates of supermassive black holes (SMBHs) in late-stage galaxy mergers by observing three ultraluminous infrared galaxies (ULIRGs), IRAS 14378-3651, IRAS 17208-0014 and IRAS 23365+3604, using the JWST/MIRI Medium Resolution ...
George H. Rieke, Victorine A. Buiten, Charles E. Goldberg, Jane Morrison, Paul van der Werf, Almudena Alonso-Herrero, Stacey Alberts, Nina Bonaventura, Zhiyuan Ji, Jianwei Lyu, P. Rinaldi, Meredith A. Stone, Yang Sun, Yongda Zhu   +13 more
doaj   +1 more source

Hard X-Ray to Radio Multiwavelength SED Analysis of Local U/LIRGs in the GOALS Sample with a Self-consistent AGN Model including a Polar-dust Component

The Astrophysical Journal Supplement Series, 2023
We conduct hard X-ray to radio multiwavelength spectral energy distribution (SED) decomposition for 57 local luminous and ultraluminous infrared galaxies observed with the Nuclear Spectroscopic Telescope Array and/or Swift/Burst Alert Telescope in the ...
Satoshi Yamada, Yoshihiro Ueda, Martín Herrera-Endoqui, Yoshiki Toba, Takamitsu Miyaji, Shoji Ogawa, Ryosuke Uematsu, Atsushi Tanimoto, Masatoshi Imanishi, Claudio Ricci   +9 more
doaj   +1 more source

Mapping the dynamics, star-formation rates, and chemical properties of galaxies with integral field spectroscopy [PDF]

, 2005
Major advances in the development of instruments for eight and ten meter class telescopes are revolutionising our understanding of galaxy formation. In particular, Integral Field Spectrographs (which produce a three dimensional {x, y, velocity) map of a ...
Swinbank, Anthony Mark, Swinback, Anthony Mark   +1 more
core  

Ultraluminous infrared galaxies: Starburst vs. AGN

, 1999
We have obtained ISOPHOT-S low resolution mid-infrared spectra of a sample of 60 Ultraluminous Infrared Galaxies (ULIRGs). We use the strength of the 'PAH' mid-infrared features as a discriminator between starburst and AGN activity, and to probe for ...
Moorwood, AFM, Genzel, R, Spoon, HWW, Rigopoulou, Dimitra, Sturm, E, Tran, D, Lutz, D, Rigopoulou, D   +7 more
core   +1 more source

Core Revelations: The Star Formation and Active Galactic Nucleus Connection at the Heart of NGC 7469

The Astrophysical Journal
We investigate the star formation–active galactic nucleus (AGN) connection in the Seyfert 1 NGC 7469 using James Webb Space Telescope mid-infrared spectroscopic integral field unit (IFU) data.
Léa M. Feuillet, Steve Kraemer, Marcio B. Meléndez, Travis C. Fischer, Henrique R. Schmitt, James N. Reeves, Anna Trindade Falcão   +6 more
doaj   +1 more source

J0107a: A Barred Spiral Dusty Star-forming Galaxy at z = 2.467

The Astrophysical Journal Letters, 2023
Dusty star-forming galaxies (DSFGs) are among the most massive and active star-forming galaxies during the cosmic noon. Theoretical studies have proposed various formation mechanisms of DSFGs, including major merger-driven starbursts and secular star ...
Shuo Huang, Ryohei Kawabe, Kotaro Kohno, Toshiki Saito, Shoichiro Mizukoshi, Daisuke Iono, Tomonari Michiyama, Yoichi Tamura, Christopher C. Hayward, Hideki Umehata   +9 more
doaj   +1 more source

Ultraluminous infrared galaxies [PDF]

, 1987
The IRAS survey of the local universe has revealed the existence of a class of ultraluminous infrared galaxies with L(8 to 1000 micrometer) greater than 10 to the 12th L sub 0 that are slightly more numerous, and as luminous as optically selected quasars
Persson, S. E., Neugebauer, G., Soifer, B. T., Scoville, N. Z., Madore, B. F., Elias, J. H., Matthews, K., Sanders, D. B., Danielson, G. E., Persson, C. J.   +9 more
core  

CO Survey of High-z Radio Galaxies, Revisited with the Atacama Large Millimeter/submillimeter Array: Jet–Cloud Alignments and Synchrotron Brightening by Molecular Gas in the Circumgalactic Environment

The Astrophysical Journal, 2023
Powerful radio sources associated with supermassive black holes are among the most luminous objects in the universe, and are frequently recognized both as cosmological probes and active constituents in the evolution of galaxies.
Bjorn H. C. Emonts, Matthew D. Lehnert, Sophie Lebowitz, George K. Miley, Montserrat Villar-Martín, Ray Norris, Carlos De Breuck, Chris Carilli, Ilana Feain   +8 more
doaj   +1 more source